Scroll to see break-even price per barrel for oil in 2015 for select oil producers, and click on a country's name for more details. modest oil-price recovery and currency devaluations have lowered breakeven prices for countries like Russia and Nigeria, but some petrostates still need oil prices above $100 a barrel to balance their budgets.
There are dozens of types of gemstones â including diamonds, colored gemstones, and pearls â each with a unique set of physical and optical properties. GIRDLE â The narrow band around the perimeter of a polished or faceted diamond or colored gemstone.
A simulated gemstone is any stone which is being sold as something it is not. It can be made of a number of different materials, including glass, plastic, and, oddly enough, other synthetic or natural gemstones. For example, Alexandrites are often simulated by using lab-created color change sapphires.